Directional casing-while-drilling
US10138683B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2013 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Mar 1, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A directional casing-while-drilling system includes a rotary steerable system disposed within a casing string used as a drill string during casing-while-drilling operations. The casing string of some embodiments may include an upper section and a lower section coupled by a swivel, which may enable the upper section of the casing string to be rotated without substantially rotating the lower section. The rotary steerable system may be disposed at least partially within the lower section of the casing string, and coupled to a drill bit and/or under-reamer. The rotary steerable system may enable radial diversion of the drill bit and/or under-reamer, for example by actuation of one or more components in the rotary steerable system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.